One of the most famous hoodoos at Bryce Canyon National Park in Utah, Thor’s Hammer stands over 10 stories high. More hoodoos are found in the park than at any other place in the world. Why? Bryce Canyon receives both above freezing temperatures and below freezing temperatures over 200 nights out of the year. During the day, water seeps into the cracks in the rocks and then when the temperature drops, it freezes and expands. This expansion into ice causes tremendous pressure on the surrounding rock and causes it to break apart, sculpting this red rock wonderland. Photo by Keith Moore, National Park Service.
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